/*******************************************************************************
 * Copyright 2017 Bstek
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.urule.parse;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.dom4j.Element;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import com.bstek.urule.model.rule.lhs.Criterion;
/**
 * @author Jacky.gao
 * @since 2014年12月23日
 */
public abstract class CriterionParser extends AbstractParser<Criterion> implements ApplicationContextAware {
	protected Collection<CriterionParser> criterionParsers;
	
	protected List<Criterion> parseCriterion(Element element){
		List<Criterion> list=null;
		for(Object obj:element.elements()){
			if(obj==null || !(obj instanceof Element)){
				continue;
			}
			Element ele=(Element)obj;
			String name=ele.getName();
			for(CriterionParser parser:criterionParsers){
				if(parser.support(name)){
					if(list==null)list=new ArrayList<Criterion>();
					Criterion criterion=parser.parse(ele);
					if(criterion!=null){
						list.add(criterion);						
					}
					break;
				}
			}
		}
		return list;
	}
		
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		criterionParsers=applicationContext.getBeansOfType(CriterionParser.class).values();
	}
}
